I realize Marschner doesn't make the role of boron very clear. I refer to Marschner's second edition on silicon, pages 417 - 426. Marschner classifies silicon as 'beneficial' rather than essential. Boron he considers essential, pages 379 - 396. Although he acknowledges their close similarity, he doesn't make the connection I do. And Marschner is, I reckon, the best of the lot as far as academia is concerned. For instance he does make a connection between manganese and silicon, which I reckon is a very important connection, (p. 423).
Control is not a synonym for kill. It is one thing to control a lawn mower, and another thing to kill it. When we seek to control weeds we need find out what gets them started and how they may change under various circumstances. This will help us understand what they do and why they are there, and it will provide valuable clues about how to stop them. The chances are we are unwittingly causing the weed to be a problem, and we should learn from that.Read more »
On a recent trip to Japan where I visited several organic farms as well as a golf course I noted that no matter how good their other practices none were composting well enough. All omitted clay from their compost mixtures. The same is commonly true on organic farms elsewhere, though I know of cases—most of them biodynamic operations—in Europe, India, the USA, Australia and New Zealand where composting is excellent. Read more »